Track-sander.



W. A. PITT.

TRACK SANDER.

APPLIATION FILED `JAN. 21, 1910.

Patented May 81, 1910.

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TINTTTD STATES PATENT OFFTCE.

WILLIAM ALEXANDER PITT, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR OF THREE-FOURTHS TO SIDNEY SMITH UNDERWOOD, OF MONTREAL, CANADA.

TRACK-SANDER.

Specification of Letters Patent.

Patented May 31, 1910.

To all whom 'it may concern:

Be it known that I, WILLIAM ALEXANDER PITT, of the city of Montreal, inthe Province of Quebec, Canada, have invented certain new and usefulImprovements in Track- Sanders; and I do hereby declare that thefollowing is a full, clear, and exact description of the same.

My invention relates particularly to vacuum track sanders operated bythe suction created by the flow of a motive fluid through a pipe abranch from which leads to the sander and acts directly upon the sand,and it has for its object to facilitate the flow of the sand under thesuction created as above.

The invention may be said to consist of the particular construction andcombination of parts hereinafter described and pointed out in theclaims.

For full comprehension, however of my invention reference must be had tothe accompanying drawings, forming a part of this specication, in whichsimilar reference characters indicate the same parts and wherein Figurel is a transverse vertical sectional view of my improved sander for alocomotive; Fig. 2 is a plan view thereof. Fig. 3 is an enlargedsectional View of the air chamber; and Fig. 4 is an enlarged detailsectional View of the union between the m0- tive fluid pipe and suctionbranch.

The sand box o may be of any preferred construction, the motive fiuidpipe c being connected to a source of compressed air or steam (notshown) and a branch d leads from this pipe and communicates with asuction chamber in the sand box and in communication with theat-mosphere. This chamber is preferably fixed to the bottom of the sandbox and it is of cylindrical form with sand intake ports in its lowerend and an air intake near its top, while its height is sufficient toextend above the body of sand in the box and the ear intakes are inaggregate capacity just sufcient to supply a small quantity of air tomingle with the sand and prevent it packing in the delivery pipe thusinsuring a freedom of flow not affected by wetness of the sand.

My improved track sander is equally applicable to locomotive and streetcar sanders.

My preferred construction comprises a pipe casting 2 with a branchconnection 3, and sand intake openings 4 in its bottom, a vertical airintake pipe 5 being screwed into the upper end of the casting and havingslits 6 in its top and a cover screwed down over the slits to regulatethe air intake capacity of these slits. The branch pipe d is connectedto branch connection 3.

Vhat I claim is as follows l. In a track sander the combination with asand box, of a suction chamber' located within the sand box and adaptedto communicate with the body of sand in the box, a suction pipe leadingfrom the chamber, and an air supply pipe connected to the said chamberat a point above the sand communication for the purpose of causing avortex. of air and sand within the chamber.

2. A track sander comprising in combination with a sand box and a motivefluid pipe with a suction branch, a pipe casting fixed to the bottom ofthe interior of the sand box and having sand intake ports in its lowerportion, a vertical pipe screwed into the top of the casting, a cap uponthe top of each vertical pipe, and t-he said pipe and cap beingconstructed and arranged to permit air to enter the pipe.

3. A track sander comprising in combination with a sand box and a motivefluid pipe with a suction branch, a pipe casting fixed to the bottom ofthe interior of the sand box and having sand intake.ports in its lowerport-ion, a vertical pipe screwed into the top of the casting and havingslits in its top, and a cap screwed upon the top of such vertical pipe.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

VILLIAM ALEXANDER PITT.

Witnesses: WILLIAM L. MGFERT,

FRED. J. SEARS.

